Pump with controllable delivery



L. H. L. BELLEM. PUMP WITH CONTROLLABLE DELIVERY.

APPLICATION FILED JAN.19, I918.

Patented Nov. 11, 1919.

2 SHEETSSHEET L. H. L. BELLEM. PUMP WITH CONTROLLABLE DELIVERY.

APPLICATION FILED JAN. 19, 19l8.

Patented Nov. 11, 1919.

2 SHEETS-SHEET 2- (((NIIIIIIIIDDD UNITED STATES PATENT ora ion.

LOUIS HENRI LIBERT BELLEM, 0F PARIS, FRANCE, ASSIGNOR T0 LA SOGIETE POUR LEXPLOITATION DES BREVETS BELLEM & BREGERAS, SIEGE SOCIAL, 0F PARIS,

FRANCE.

PUMP WITH GONTROLLABLE DELIVERY.

Specification of Letters Patent.

Patented Nov. 11, 1919.

Application filed January 19', 1918. Serial No. 212,738.

To all whom it may concern:

Be it known that I, LOUIS HENRI LIBERT BELLEM, citizen ofthe Republic of France, and resident of Paris, France (post-office address 6 Rue St. Philippe du Roule,) have invented a new and useful Pump with Controllable Delivery, which improvements are fully set forth in the following specification.

The object of the present invention is a pump with a controllable delivery particularly intended for use in supplying combustible fuel to internal combustion engines.

The accompanying drawings show by way of example the pump of the present invention.

Figure 1 is a vertical section of the improved pump.

Fig. 2 is a similar view showing a difierent working stage of the pump.

Figs. 3 and 4 show the pump adjusted for a different delivery.

Fig. 5 is a modification on a larger scale.

a is a plunger of quenched and annealed steel having an extension 7) of larger diameter and sliding in a guide 0, the latter being screwed concentrically into the cylinder 05 in which a constant level 00, y, is maintained by any known means. The tight bottom of the cylinder d is formed by a member 6 of quenched and annealed steel carrying a conical seat f. 011 said member is mounted the discharge valve 9 consisting for example of a leather cup arranged as shown in the drawings. h is the pump body proper, which carries at its lower end a conical seat 71 fitting on the cone f.

The packing j consists of cork washers disposed within a cylindrical member Z and tightly compressed between that member and the member h. The cork is elastic and stands wear and tear in a remarkable manner. The quenching of the plunger a-is' necessary in order to prevent it from being worn down by the cork.

The length. of the complete body of the pump consisting of the cylindrical members it and Z is such that there is a play of about 1 mm. at m when the cones f and z are in contact.

The pump works in the following manner:

Assuming that the two seats f and z' are' in contact, when the plunger. a is raised the friction of the packing j causes said plunger a to lift the cylindrical member Z, until the latter strikes against the shoulder of the guide 0. \Vhile the plunger continues its up stroke, the cylinder fills freely and without fear of any air being drawn in, the whole being immersed in the liquid. The first effect of the downstroke is to bring the two seats into contact, whereupon the discharge of the liquid is effected through pipe 0. It should be remarked that there is no vertical force sufiicient to cause separation of the two seats, the vertical force being counteracted by the plunger a.

By acting on the handle p the guide 0 is unscrewed for a short distance as shown in Figs. 3 and 1. The plunger a carrying the cylindrical member Z only commencing its actual suction stroke when said member Z comes in, contact with the guide 0, the amount of liquid drawn up is thus reduced by an extent whichis proportional to the increase of the play m,

Thus by merely adjusting the position of the shoulder of the guide 0 the delivery of the pump can be controlled at will.

The plunger is operated by any of the usual means for instance an eccentric or cam movement. I

In the modification shown in Fig. 5 the plunger 1 terminates in a guide member 2 of larger diameter and provided with a slot 3 in which engages the nose of a skeleton cam 4, thelatter being mounted on a pivot 1 and actuated byan interior cam 5 secured to a spindle 5.

The drawings show the plunger at the top of its stroke. The plunger 1 slides in a body consisting of a cylindrical member 6 and a plug 7. A number of cork washers forming a stufling gland are superimposed and compressed in the cylindrical member 6; cork having as aforesaid the remarkable property of being almost indestructible and exerting a practically constant friction on the plunger 1. The guide 2 of the plunger 1 slides in a sleeve 8 in one side of which is cut a rack engaging with a pinion 9 operated from the outside; this arrangement allows the position of the sleeve 8 to be varied in the vertical direction. The chamber 1 washer 14:.

said chamber. The chamber ill housing the cam at is filled with a highly viscous 011 or thick fat.

Contrary to the arran ement of the prepart with a hemispherical recess the curvature of which corresponds to that of the elastic washer 15, the other face of the plug being flat.

The metal washer 14 and the fiber washer 15 lie free in their box so that they can adjust themselves exactly according to the plane of the end of the cyllndrical member 6. When the latter rises the above described valve adjusts itself and the parts 14, 15 and 17 come into firm contact under the force of the plunger 1 transmitted by the cork to the cylinder 6. The delivery is efiected through a fiat valve13 arranged above the aforesaid valve 14-, 15, said valve 13 being controlled by a weak spring 18 which acts on the spherical outer surface thereof in order to press the valve uniformly against its seat.

To avoid the inconvenience which would result if the valve 13 could be too easily lifted after the delivery stroke, a spring 12 arranged in the lower part below the guide 2 maintains always good contact between the upper end of thecylinder 6 and the The drawings show, a spiral spring 12 housed in the lower part of the sleeve .8, but it will be evident that any other form of spring could be employed below the sleeve 8.

The apparatus works in the following manner The plunger 1 being at the top of its stroke and the cam shaft 5 continuing its movements, the cam 4: remains at first in a stationary position and the cylindrical member 6 is pushed against the washer 14 by the spring 12 arranged below the guide 2. The

cam 5' comes then into contact with the lower interior part of the cam 4: and the plunger 1 descends and carries with it the movable member 6, in consequence of the friction of the cork contained in said member. This member 6 consequently moves away fromthe flat seat 14 and its lower end makes contact with the flanged sleeve 8 the position of which has been arranged and adjusted for the desired delivery, by

means of the piston 9. At this moment the down stroke of the member 6 is stopped -while that of the plunger 1 continues. The ,liquid thereupon enters at the top of the member 6 under the influence of the suction produced by the plunger 1. As the movement of the cam 5 continues, the plunger rises and carries with it the member 6 until said member comes into contact with the flat'washer 14 which arrests its stroke. The plunger 1 thereupon discharges the liquid, which it has sucked in, through the automatic non-return valve 13, arranged abov the passage provided in the valve de vice (14, 15, 16, 17) controlling the intake into the interior of the cylindrical member 6. v

In order to lessen the delivery it is sufficient to act upon the pinion 9 and thus lower the stop 8. the plunger 1 and the cylindrical member 6 is thus diminished and consequently the delivery is reduced. The delivery can be reduced to any desired extent, delivery becoming zero when the space between the base of the cylindrical member 6 and the top of the stop sleeve 8 is equal to the constant stroke of the plunger 1. v e

In the case of a multi-cylinder engine there will be as many plungers as there are cylinders, the whole being inclosed in the same casing, the necessary precautions being taken to avoid the leakage of the oil or fat from said casing.

adapted to contact during the discharge stroke of the plunger; and an elastic member disposed upon the upper face of said washer and having a central perforation in a register with the perforation in the washer.

2.-In a pump of the character described, 7 the combination of a plunger having an extension which forms a guide therefor; means for reciprocating the plunger; a cylindrical pumpguide immersed in the liquid to be pumped and through which the plunger extends, said pump body containing packingwhich frictionally engages the plunger, whereby it is caused to move with said plunger; a sleeve in which said extension slida'bly fits, said sleeve having a portion disposed in the path of the pump body to engage the confronting end thereof and thereby terminate the movement of said body in one direcwhich the upper end" of the pump body is adapted to contact during the discharge stroke of the plunger; and an elastic Inemfor reciprocating the plunger; a sleeve ber disposed upon the upper face of said wherein said extension slidably fits; a cylinwasher and having a central perforation in drical pump body immersed in the liquid to register with the perforation in the washer. be pumped and through which the plunger 3. In a pump of the character described, extends, said pump body having an enlarged the combination of a plunger having an exportion containing compressed cork which tension which forms a. guide therefor;means frictionally engages the plunger so as to for reciprocating the plunger; a cylindrical cause the latter to raise and lower the pump pump body immersed in the liquid to be body with it; a thin perforated metal washer pumped and through which the plunger exforming a stop against which the upper end tends, said pump body having frictional enof the pump body is adapted to strike; a gagement with the plunger, whereby said hemispherical elastic washer resting at its body is causedsto move with said plunger; a flat under face on the metal washer and havsleeve in'which said extension slidably-fits," ing a central perforation in register with said sleeve having its upper end confronting the perforation in said metal washer; a the lower end of the pump body to be envalve seat for said elastic washer; and a gaged thereby so as to terminate the downspring acting against tlfie lower end of the ward movement of the pump body with the plunger to press the said upper end of the plunger; a vertical rack on the side of said pump body against said metal washer. sleeve; and a pinion engaging said rack to In testimony whereof I have signed this raise or lower the sleeve toward or from the specification in the presence of two subscribpump body and thereby vary the extent of 'ing witnesses. movement of the latter with the plunger.

4:. In a pump of the character described, the combination of a plunger having an extensionwhich forms a guide therefor; means LOUIS HENRI LIBERT BELLEM.

Witnesses:

GEORGES LoIsEL; EMILE BERTRAND. 

